Hi. First of all: Copy a numpy matrix into a fencis function - #2 by edgar
Then, I really hope that I’m not doing a disservice here, but if you are getting a different answer, may be it has to do with the way you are getting the components cos(x[0]) (I thought of posting the earlier link, because I don’t see the definition of x).
Also, depending on your issue, may be some circumferential symmetry could help (?).
In any case, you may be better off not listening to me, except for what the link says. Good luck.